package com.huangliusong.threadcurrency.example.commonUnsafe;

import lombok.extern.slf4j.Slf4j;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Semaphore;

/**
 * @author huangliusong
 * @since 2018/11/20
 * {@link }
 */
@Slf4j
public class DataFormateExample2 {

    //请求总数
    public static int clientTotal=5000;
    //t
    public static int threadTotal=200;


    public static void main(String[] args) throws InterruptedException {
        ExecutorService executorService=Executors.newCachedThreadPool();
        final Semaphore semaphore=new Semaphore(threadTotal);
        final CountDownLatch countDownLatch=new CountDownLatch(clientTotal);
        for (int i=0;i<clientTotal;i++){
            executorService.execute(()->{
                try {
                    semaphore.acquire();
                    update3();
                    semaphore.release();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                countDownLatch.countDown();
            });
        }
        countDownLatch.await();
        executorService.shutdown();
       // log.info("stringBuilder.length:{}",stringBuilder.length());
    }

    private static  void update3(){
        //stringBuilder.append("1");
        try{
             SimpleDateFormat simpleDateFormat=new SimpleDateFormat("yyyyMMdd");
            Date s=simpleDateFormat.parse("20181116");
            System.out.println(s);
        }catch (Exception e){
            e.printStackTrace();
        }

    }
}
